The work done in carrying a charge Q once around a circle of radius r about a charge q at the centre is

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The work done in carrying a charge $\mathrm{Q}$ once around a circle of radius $\mathrm{r}$ about a charge $\mathrm{q}$ at the centre is

PhysicsElectrostaticsWBJEEWBJEE 2009

Options:

A $\frac{q Q}{4 \pi \varepsilon_0 r}$
B $\frac{q Q}{4 \pi \varepsilon_0} \frac{1}{\pi r}$
C $\frac{q Q}{4 \pi \varepsilon_0}\left(\frac{1}{2 \pi r}\right)$
D $0$

Solution:

1711 Upvotes Verified Answer

The correct answer is: $0$

Work done by conservative force in a round trip is zero

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